Hi Aditya,

You already have a good academic background. So you should start building your resume to better your chances.In order to crack IIM's you need to appear for CAT and MICAT for MICA, Ahmedabad.

Common Admission Test (CAT) is national-level management entrance examination conducted by the Indian Institutes of Management (IIM). Apart from 20 IIMs, CAT scores are used for admission to various management institutes across the country.

Top IIM's such as IIM A,B,C easily require 99+ together with work ex and good academic record. A score of 95+ is necessary to get a GD/PI call in other IIMs. Your tentative performance in the interview and your entire profile would be considered during selections.

Similarly, MICA shortlists students who have secured the cutoff in the national level MICAT test for further rounds of interview. 

Good luck!